<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>DOM</title>

</head>
<body>
<dl id="app">
    <dt>java</dt>
    <dd>javaSE</dd>
    <dd>javaWeb</dd>
    <dd>javaEE</dd>
</dl>

<script>
    var dl = document.getElementById('app');
</script>
</body>
</html>